1. The Feeler Antlion needs to be kept alive and tanked, and it will spawn an Executioner Antlion periodically.
   试探者蚁狮需要保持活着而且储于槽中, 和它将会定期地产一个死刑运行人蚁狮。
2. Economic crises recur periodically.
   经济危机周期性地发生。
3. The geyser erupts periodically.
   间歇泉周期性地喷发。
4. In eastern China, transgression occured periodically during Eogene, and formed specially paleobio-cenosis,mineral association and rock type.
   在中国东部早第三纪沉积演化过程中曾周期性地发生过海侵,从而形成了具有海相特征的岩石类型、古生物组合。
5. As part of the program, Lown Scholars may also return to Harvard periodically for short-term stays of one week to several months to continue collaborations.
   作为该项目的一部分，获得奖学金的学者或需定期返回哈佛进行一周至数月不等的短期访问，以继续与学院的合作。
6. The time-varying and incommutable character of the coefficient matrix of periodically time-varying linear systems are the bottleneck of the design for high precision direct integration methods.
   周期时变线性系统系数矩阵的时变性与不可交换性是其精细积分算法设计中的瓶颈。
7. Halosere A plant community in a succession that starts on land periodically inundated by the sea. Haloseres include salt-and flooding-tolerant pioneer communities on mudflats and saltmarshes.
   是一种在周期性被海水淹没的陆地上进行演替的植物群落。它包括那些在泥滩和盐沼上生活的耐盐耐淹的先锋群落。
8. Those enterprises keep books at planned cost or norm cost in daily accounting shall account for the coit variances and adjust planned cost (or norm cost) into historical cost periodically.
   采用计划成本或者定额成本法进行日常核算的，应当按期结转其成本差异，将计划成本或定额成本调整为实际成本。

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